Metal treatment – Compositions – Heat treating
Patent
1981-12-22
1983-05-24
Stallard, W.
Metal treatment
Compositions
Heat treating
266 54, 266 57, B23K 704
Patent
active
043849016
ABSTRACT:
A method and apparatus for cutting a pipe. A pipe is positioned on a plurality of support rollers for rotating the pipe. A cutting torch, mounted on a telescoping arm, is movable along the longitudinal axis of the pipe. The angle that the cutting torch makes with the surface of the pipe is varied by rotating the cutting torch along an arcuate path that is in a plane parallel and perpendicular to the longitudinal axis of the pipe. The cutting torch is directed towards the radial center of the arcuate path that is on the surface of the pipe. Servo motors selectively vary the rotational angle of the pipe, the position of the cutting torch and the angle of the cutting torch. A computer automatically controls the operation of the servo motors with the aid of a pre-programmed mathematical function. The mathematical function uses characteristic data for the pipe and feedback data from the servo motors.
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Babb Harvey
Swoboda, III John J.
Lame, Inc.
Mills Jerry W.
Stallard W.
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